SOLUTION: one of the two watches gains 12 seconds in 18 days and the other loses 20 seconds in 30 days. If the watches were together at noon on a certain day, how many minutes apart would th

Question 630914: one of the two watches gains 12 seconds in 18 days and the other loses 20 seconds in 30 days. If the watches were together at noon on a certain day, how many minutes apart would they be 90 days later?

Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
one of the two watches gains 12 seconds in 18 days and the other loses 20 seconds in 30 days.
If the watches were together at noon on a certain day, how many minutes apart would they be 90 days later?
:
Find how many seconds gained or lost one day
1st watch: 12/18 = +2/3 sec per day
2nd watch: 20/30 = -2/3 sec per day
:
*90 = + 60 sec
*90 = - 60 sec
--------------------------subtract to find difference
Total dif: 120 sec, which is 2 minutes
:

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